The Oval 316 Stainless Steel Boat Garboard Drain Plug is a reliable and durable accessory for boats. Made from high-quality 316 stainless steel, this drain plug is designed to fit a 1" hole with an O-ring for a secure seal. The size of 38 x 50 mm and a screw hole size of M5 make it suitable for various boat applications. This product is a must-have for any boat owner looking to maintain their vessel's plumbing system.